model.param.define {RGeostats} | R Documentation |

Specification of the Model Parameters

model.param.define(rank.model, nostat = NULL)

`rank.model` |
Rank of the slot to which the model has been assigned |

`nostat` |
Array of keywords which define the set of Non-stationary parameters. Each keyword follows the following syntax: G'igrf'M'istr”type”v1'[-'v2']='value' Example: "G1M2V2-3" for the Sill of the cross-variogram between Variables #2 and #3, for the Structure #2 of the Random Function #1. The string "G" stands for the designation of the Random Function. 'igrf' stands for the rank of the Random Function. Defaulted to 1. The string "M" stands for the designation of the Structure. 'istr' stands for the rank of the Structure. Defaulted to 1. 'type' designates the type of non-stationarity parameter according the following possibilities: R for Range S for Scale A for Anisotropy angle P for the auxiliary Parameter V for the sill
This 'keyword' is compulsory. v1,v2 designate additional rank(s) for the Non-stationary parameter: For Range: 'v1' stands for the space dimension. Defaulted to 1. For Scale: 'v1' stands for the space dimension. Defaulted to 1. For Anisotropy Angle: 'v1' stands for the space dimension. Defaulted to 1. For auxiliary Parameter: 'v1' and 'v2' are ignored. For sill: In the monovariate case, only 'v1' should not be specified ('v2' is ignored). In the multivariate case 'v1'-'v2' gives the rank of the two variables of interest. Defaulted to '1-1'.
'=' Compulsory symbol if a numerical value is assigned to the specified parameter. 'value' Value assigned to the specified parameter. Defaulted to NA. This feature is only required when specifying initial values of bounds used during the Automatic Structure recognition (See details).
All elements 'igrf', 'istr', 'v1' and 'v2' start from 1. The order in which the keywords are defined is important: it provides the order in which the corresponding Non-stationary locators are read. Finally all the characters involved in this grammar are case-insensitive |

An array of such keywords can be specified for particular usage:

To designate the 'variable' parameter of the Model in the case of Moving Geostatistics.

To designate the list of constraints applied during the automatic inference of the parameters of a Model:

Initial value of a parameter

Lower or Upper bounds for a parameter definition interval

Value assigned to a parameter

[Package *RGeostats* version 11.1.1 Index]